422142840 has 240 divisors, whose sum is σ = 1651141800. Its totient is φ = 96453504.

The previous prime is 422142781. The next prime is 422142857. The reversal of 422142840 is 48241224.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 157431 + ... + 160089.

Almost surely, 2^422142840 is an apocalyptic number.

422142840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 422142840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (825570900).

422142840 is an abundant number, since it is smaller than the sum of its proper divisors (1228998960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

422142840 is a wasteful number, since it uses less digits than its factorization.

422142840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2696 (or 2676 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 27.

The square root of 422142840 is about 20546.1149612281. The cubic root of 422142840 is about 750.1586864225.

It can be divided in two parts, 42214 and 2840, that added together give a palindrome (45054).

The spelling of 422142840 in words is "four hundred twenty-two million, one hundred forty-two thousand, eight hundred forty".